2bf8: Difference between revisions

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[[Image:2bf8.gif|left|200px]]
{{Seed}}
[[Image:2bf8.png|left|200px]]


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{{STRUCTURE_2bf8|  PDB=2bf8  |  SCENE=  }}  
{{STRUCTURE_2bf8|  PDB=2bf8  |  SCENE=  }}  


'''CRYSTAL STRUCTURE OF SUMO MODIFIED UBIQUITIN CONJUGATING ENZYME E2-25K'''
===CRYSTAL STRUCTURE OF SUMO MODIFIED UBIQUITIN CONJUGATING ENZYME E2-25K===




==Overview==
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Post-translational modification with small ubiquitin-related modifier (SUMO) alters the function of many proteins, but the molecular mechanisms and consequences of this modification are still poorly defined. During a screen for novel SUMO1 targets, we identified the ubiquitin-conjugating enzyme E2-25K (Hip2). SUMO attachment severely impairs E2-25K ubiquitin thioester and unanchored ubiquitin chain formation in vitro. Crystal structures of E2-25K(1-155) and of the E2-25K(1-155)-SUMO conjugate (E2-25K(*)SUMO) indicate that SUMO attachment interferes with E1 interaction through its location on the N-terminal helix. The SUMO acceptor site in E2-25K, Lys14, does not conform to the consensus site found in most SUMO targets (PsiKXE), and functions only in the context of an alpha-helix. In contrast, adjacent SUMO consensus sites are modified only when in unstructured peptides. The demonstration that secondary structure elements are part of SUMO attachment signals could contribute to a better prediction of SUMO targets.
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{{ABSTRACT_PUBMED_15723079}}


==About this Structure==
==About this Structure==
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[[Category: Sumo]]
[[Category: Sumo]]
[[Category: Sumo-target structure]]
[[Category: Sumo-target structure]]
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Apr 13 08:17:54 2008''
 
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 29 02:39:41 2008''

Revision as of 23:39, 28 July 2008

File:2bf8.png

Template:STRUCTURE 2bf8

CRYSTAL STRUCTURE OF SUMO MODIFIED UBIQUITIN CONJUGATING ENZYME E2-25K

Template:ABSTRACT PUBMED 15723079

About this Structure

2BF8 is a Protein complex structure of sequences from Bos taurus and Homo sapiens. Full crystallographic information is available from OCA.

Reference

SUMO modification of the ubiquitin-conjugating enzyme E2-25K., Pichler A, Knipscheer P, Oberhofer E, van Dijk WJ, Korner R, Olsen JV, Jentsch S, Melchior F, Sixma TK, Nat Struct Mol Biol. 2005 Mar;12(3):264-9. Epub 2005 Feb 20. PMID:15723079

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